Added POlar Linear Interpolation #story[1186]

racevisionGame/src/main/java/mock/dataInput/PolarParser.java

@@ -3,6 +3,7 @@ package mock.dataInput;
 
 
 import mock.exceptions.InvalidPolarFileException;
+import mock.model.NewPolars;
 import mock.model.Polars;
 import shared.model.Bearing;
 
@@ -89,7 +90,6 @@ public class PolarParser {
                     Bearing angle = Bearing.fromDegrees(angleDegrees);
                     double boatSpeedKnots = Double.parseDouble(row[i + 1]);
                     polarTable.addEstimate(windSpeedKnots, angle, boatSpeedKnots);
-                    polarTable.addPolars(windSpeedKnots, angle, boatSpeedKnots);
 
                 } catch (NumberFormatException e) {
                     throw new InvalidPolarFileException("Could not convert (Row,Col): (" + rowNumber + "," + i +") = " + row[i] + " to a double.", e);
@@ -105,4 +105,91 @@ public class PolarParser {
         return polarTable;
     }
 
+    /**
+     * Given a filename, this function parses it and generates a Polar object, which can be queried for polar information.
+     * @param filename The filename to load and read data from (loaded as a resource).
+     * @return A Polar table containing data from the given file.
+     */
+    public static void parseNewPolars(String filename) throws InvalidPolarFileException {
+        NewPolars newPolars = new NewPolars();
+
+
+        //Open the file for reading.
+        InputStream fileStream = PolarParser.class.getClassLoader().getResourceAsStream(filename);
+        if (fileStream == null) {
+            throw new InvalidPolarFileException("Could not open polar data file: " + filename);
+        }
+        //Wrap it with buffered input stream to set encoding and buffer.
+        InputStreamReader in = null;
+        try {
+            in = new InputStreamReader(fileStream, "UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            throw new InvalidPolarFileException("Unsupported encoding: UTF-8", e);
+        }
+        BufferedReader inputStream = new BufferedReader(in);
+
+
+        //We expect the polar data file to have the column headings:
+        // Tws, Twa0, Bsp0, Twa1, Bsp1, UpTwa, UpBsp, Twa2, Bsp2, Twa3, Bsp3, Twa4, Bsp4, Twa5, Bsp5, Twa6, Bsp6, DnTwa, DnBsp, Twa7, Bsp7
+        //and to have 7 rows of data.
+        //Angles are expected to be in degrees, and velocities in knots.
+
+
+        //We read data rows, and split them into arrays of elements.
+        ArrayList<String[]> dataRows = new ArrayList<>(7);
+        try {
+            //Heading row.
+            //We skip the heading row by reading it.
+            String headingRow = inputStream.readLine();
+
+            //Data rows.
+            while (inputStream.ready()) {
+                //Read line.
+                String dataRow = inputStream.readLine();
+
+                //Split line.
+                String[] dataElements = dataRow.split(",");
+
+                //Add to collection.
+                dataRows.add(dataElements);
+
+            }
+
+        } catch (IOException e) {
+            throw new InvalidPolarFileException("Could not read from polar data file: " + filename, e);
+        }
+
+        //Finished reading in data, now we need to construct polar rows and table from it.
+        //For each row...
+        int rowNumber = 0;
+        for (String[] row : dataRows) {
+
+            //For each pair of columns (the pair is angle, speed).
+            //We start at column 1 since column 0 is the wind speed column.
+            for (int i = 1; i < row.length; i += 2) {
+
+                //Add angle+speed=velocity estimate to polar table.
+                try {
+
+                    //Add the polar value to the polar table
+                    double windSpeedKnots = Double.parseDouble(row[0]);
+                    double angleDegrees = Double.parseDouble(row[i]);
+                    Bearing angle = Bearing.fromDegrees(angleDegrees);
+                    double boatSpeedKnots = Double.parseDouble(row[i + 1]);
+                    newPolars.addPolars(windSpeedKnots, angle, boatSpeedKnots);
+
+                } catch (NumberFormatException e) {
+                    throw new InvalidPolarFileException("Could not convert (Row,Col): (" + rowNumber + "," + i +") = " + row[i] + " to a double.", e);
+
+                }
+            }
+
+            //Increment row number.
+            rowNumber++;
+
+        }
+        newPolars.linearInterpolatePolars();
+
+    }
+
 }